var fs = require('fs');
var data = '';

//创建可读流
var readerStream = fs.createReadStream('input.txt');

//设置编码
readerStream.setEncoding('utf-8');

//处理流事件  -->data,end, and error
readerStream.on('data', function(chunk){
	data += chunk;
});

readerStream.on('end', function(){
	console.log(data);
});

readerStream.on('error', function(err){
	console.log(err.stack);
});

console.log('程序执行完毕');